INDUSTRY COMPONENT

Brake Piston(s)

Hydraulic component in brake calipers that applies pressure to brake pads against rotors for vehicle deceleration.

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Component Specifications

Definition
A cylindrical hydraulic piston housed within a brake caliper bore that converts hydraulic pressure from the master cylinder into mechanical force, pushing brake pads against the rotor to create friction and slow or stop a vehicle. It operates within a sealed system with dust boots and seals to prevent contamination.
Working Principle
Uses Pascal's law: hydraulic pressure from brake fluid is transmitted equally in all directions, forcing the piston outward to press brake pads against the rotor, converting kinetic energy into thermal energy through friction.
Materials
Typically aluminum alloy (A356-T6) for lightweight corrosion resistance, or phenolic resin for thermal insulation; seals made of EPDM or HNBR rubber; optional ceramic coatings for high-performance applications.
Technical Parameters
  • Stroke 2-10 mm
  • Diameter 30-60 mm
  • Surface Finish Ra 0.4-0.8 μm
  • Temperature Range -40°C to 200°C
  • Operating Pressure 10-20 MPa
Standards
ISO 6310, DIN 74254, SAE J431

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Brake Piston(s).

brake piston caliper piston hydraulic piston automotive braking brake component disc brake piston Brake Piston(s) Brake Piston(s) in Motor Vehicle Manufacturing

Parent Products

This component is used in the following industrial products

Brake Caliper/Pads

Hydraulic clamping device and friction material that converts kinetic energy to thermal energy to slow or stop vehicle motion.

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Engineering Analysis

Risks & Mitigation
  • Hydraulic fluid leakage leading to brake failure
  • Piston seizure due to corrosion or contamination
  • Overheating causing seal degradation
  • Improper installation causing misalignment
FMEA Triads
Trigger: Seal wear or damage
Failure: Fluid leakage and pressure loss
Mitigation: Regular inspection and use of high-temperature resistant seals
Trigger: Corrosion from road salt or moisture
Failure: Piston sticking or binding
Mitigation: Apply protective coatings and ensure proper dust boot integrity
Trigger: Contamination with debris
Failure: Scored piston surface and seal damage
Mitigation: Clean caliper bore during service and use quality brake fluid

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Diameter tolerance ±0.02 mm, surface roughness ≤0.8 μm
Test Method
Pressure testing per ISO 6310, leak test at 20 MPa, endurance cycling at operational temperatures

Buyer Feedback

★★★★☆ 4.9 / 5.0 (18 reviews)

"The technical documentation for this Brake Piston(s) is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Motor Vehicle Manufacturing environments. No issues with the Brake Piston(s) so far."

"Testing the Brake Piston(s) now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

What causes brake piston failure?

Common causes include seal degradation from heat or age, corrosion from moisture ingress, and contamination leading to sticking or leakage.

How often should brake pistons be inspected?

Inspect during every brake pad replacement (typically every 40,000-70,000 km) for wear, corrosion, and smooth operation.

Can brake pistons be reused after repair?

Yes, if cleaned, inspected for damage, and fitted with new seals; severely corroded or scored pistons must be replaced.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Brake Pads Brake rod